I don't cook on the Traeger as often as many of you guys, so I still empty the hopper. However, I have also concluded that flavor of the pellets or even the brand makes very little difference in the taste of the cooked meat. Walmart still has Pit Boss pellets for $9 for a 20 lb bag and that's just fine for me.
I also agree that smoke from the tubes makes a big difference and thats where my focus will be. I am getting different flavored wood chips to test on the meats. They are so easy to use and produce so much smoke flavor that there is no good reason not to use them.